Grinding-machine.



PATENTED SEPT. 19, 1905. W. R. POX. GRINDING MACHINE. APPLICATION FILED001224, 1904.

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PATENTED SEPT. '19, 1905. W. R. FOX.

GRINDING MACHINE.

APPLICATION FILED 00124, 1904.

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amoms, wAsummou a c WILLIAM R. FOX, OF GRAND RAPIDS, MICHIGAN.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed October 24., 1904:. Serial No. 229,794.

To all uflwm/ it may concern.-

Be it known that I, WILLIAM R. Fox, a citizen of the United States,residing at the city of Grand Rapids, county of Kent, State of Michigan,have invented certain new and useful Improvements inGrinding-lllachines, of which the following is a specification.

This invention relates to improvements in grinding machines, althoughthe improvements are adapted to other uses, as to polishing and buflingmachines, saws, or other rotary tools.

The objects of this invention are, first, to provide an effective meansof throwingsuch machines into and out of operation; second, to providean improved means of protecting the bearing parts by a specialarrangement of parts; third, to provide an improved means of inductingaway the dust and particles from such a machine.

Other objects relating to details of construction will definitely appearfrom the description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined, and pointed out in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawings,formingapart of thisspecification, in whichv Figure 1 is a front elevation view of myimproved grinding-machine, the base part being shown in broken sections.Fig. 2 is a detail vertical sectional elevation view taken on a linecorresponding to line 00 a: of Fig. 1 looking toward the left. Fig. 3 isan enlarged detail sectional view taken on a line corresponding to theirregular line 3/ 3 of Fig. 1 looking toward the left, thecounterbalance-spring being shown on the section a little to the left ofthe main line y 3 Fig. A is an enlarged detail perspective view of theshield and dustcollector, embracing one of the grindingwheels, theright-hand shield being shown here. Fig. 5 is a detail end elevationview of such a shield and collector, the mouth of the same beingindicated as adjustable by dotted lines.

In the drawings similar characters of reference refer to similar partsthroughout the several views.

Referringto the drawings, the base Ais hollow with a suitable flangeextension for attachment to the floor. A door is provided for access tothe interior. The upper portion is separated by a diaphragm W, whichcontains an aperture A at its center, to which a pipe 5, as indicated bydotted lines, may be connected for inducting away the dust and particlesfrom the grinding. Supported on a suitable trunnion O at the upper endof this base is an arm B, extending forwardly therefrom and providedwith a pair of boxings B B. Through these boxings extend a shaft D, anda pulley D is secured at the center by any suitable means. A belt (notshown) extends from a shaft above for the purpose of driving thegrinding-wheels E E, which are supported at each end of the shaft D.

The shaft'H is supported in suitable eyes 0 O O O on the side of thebase or may be supported by an independent support at this point. Thisshaft is controlled by hand-wheels I I at each end. On this shaft is aneccentric Gr, which is connected by an adjustable connection to the armB above. This connection consists of an eccentric-band Gr, having ahollow sleeve transverse thereto connecting to a sleeve F above by anadjustable screw J. This screw J is right-handed above and left-handedbelow and is adjustable by a nut K, so that the exact length of theconnection from the eccentric to the arm B can be closely regulated. Apivot L connects the sleeve F to the arm B.

On a small wheel R, secured to the pulley D or the shaft D, Whichever ismost convenient, is a band-brake R, extending around the same andsecured to a suitable support U- on the arm B. This brake is connectedby the rod S and screw P to a lug P, projecting from the frame A below,so that when the arm B is allowed to swing up the brake R isautomatically tightened on the wheel R and immediately stops itsmovement.

A plunger 6 is in a socket Q on the base A and is held normally upwardby a coiled spring 7. This plunger contacts with the boss 8 on the underside of the arm B and serves as a counterbalance therefoigmaking thesame easy to operate. i

The base A being hollow-is connected to suitable hoods M, which surroundthe grinding-wheels E, these hoods having a trunk N, suitablyflanged,which are secured to embrace the opening V on the side of the machine.The walls of the hood M embrace both sides of the grinding-wheel E andhave adjustable flaps 12 and 13, which are hinged at 9 and 10 to whatmight be regarded as the ICC periphery of the hood and are adjustable bythumb-screws in the slots 11 to closely embrace said grinding-wheel, asclearly appears from Figs. 2, 4:, and 5.

In operation when it is desired to throw the machine into gear thehand-wheels are turned over, so that the eccentric by its connectionpulls the arm B downward. This tightens the belt on the pulley D andthrows the machine into operation. The operator brings any article thathe desires to be ground or, in the event that the machine is used as apolisher, to be polished into contact with the wheels E. By closing theflaps of the hood well down toward the wheel the grindings are drawninto and down through the hollow base A, so that all dust and particlesof metal are carried away from the workman and conducted out of thecompartment where the machine is used, so that the machine is a verysatisfactory machine in operation. When the workman is through, hesimply gives the handwheels I a throw upwardly, and through theirconnections they lift the arm B upwardly, which of course slacks thedriving-belt. The brake R is applied by the same movement, whichimmediately stops the machine and, the whole being counterbalanced,makes it easy to operate.

It will be seen that this machine is a double machine, having grindersat each. side, and is very effective and satisfactory on that account,though of course but a single grinding-wheel might be used.

While I have shown the grinding-wheels supported on a pivoted arm, Idesire to remark that they may be supported in a variety of ways so longas they can be moved readily up and down to tighten or slacken the belt.I show only the means preferred by me, which I desire to claim broadlyas well as specifically.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent. is

1. In a machine of the class described, the combination of a hollow baseA; an arm B pivoted to the said base; boxings B carried by said arm; ashaft D with adriving-pulley D in said boxings; grinding-wheels E onsaid shaft; a shaft H supported in suitable bearings O on the base; ahand-wheel I for operating" the said shaft; an eccentric G on the saidshaft; an adj ustable connection from said eccentric to a pivot L on thearm B, the connection being made adjustable by a right and left handscrew J; a counterbalance for the arm Bconsisting of a socket Gr on saidbase, a plunger 6 in said socket, and a spring 7 for throwing saidplunger up against the under side of the arm B; a brake mechanismconsisting of the band B se- Icured to the base A and embracing abrakewheel R at the end of the pulley D, the upper end of said brakebeing secured to a lug Uon the arm B whereby the brake will be appliedautomatically when the arm is swung upwardly to slacken thedriving-belt; and hoods M with adjustable flaps 12 and 13, embracing thesaid grindingwheels E, provided with trunks N connecting the same to thesaid hollow base, all coacting substantially as described and for thepurpose specified.

2. In a machine of the class described, the combination of a hollow baseA; an arm B pivoted to the said base; boxings B carried by said arm; ashaftD with a driving-pulleyl) in said boXings; grinding-wheels Eon saidshaft; a

shaft H supported in suitable bearings O on the base; a hand-wheel I foroperating the said shaft; an eccentric G on the said shaft; anadjustable connection from said eccentric to a pivot L on the arm B, theconnection being made adjustable by a right and lefthand screw J; acounterbalance for the arm B; a brake mechanism consisting of the band Bsecured to the baseAand embracing a brake-wheel R at the end of thepulley D, the upper end of said brake being secured to a lugV on the armB, whereby the brake will be applied automatically when the arm is swungupwardly to slacken the driving-belt; and hoods M with adjustable flaps12 and 13, embracing the said grinding-wheels E, provided with trunks Nconnecting the same to the said hollow base, all coacting substantiallyas described and for the purpose specified.

3. In a machine of the class described, the combination of a hollowbase; an arm B pivoted to the said base; boxings B carried by said arm;a shaft D with a driving-pulley D in said boxings; grinding-wheels E onsaid shaft; a shaft H supported in suitable bearings O on the base; ahand-wheel I for operating the said shaft; an eccentric G on the saidshaft; an adjustable connection from said eccentric to a pivot L on thearm B, the connection being made adjustable by a right and left handscrew J; a counterbalance for the arm B, consisting of a socket K onsaid base, a plunger 6 in said socket, and a spring? for throwing saidplunger up against the under side of the arm B; a brake mechanismconnected to be applied au tomatically when the-arm is swung upwardly toslacken the driving-belt; and hoods M with adjustable flaps 12 and 13,embracing the said grinding-wheels E, provided with trunks N connectingthe same to the said hollow base, all coacting substantially as desc'ribed and for the purpose specified.

4. In a machine of the class described, the combination of a hollow baseA; an arm B pivoted to the said base; boxings B carried by said arm; ashaft D with a driving-pulley D in said boxings; grinding-wheels E onsaid shaft; a shaft H supported in suitable bearings O on the base; ahand-wheel I for operating the said shaft; an eccentric G on the saidshaft; an adjustable connection from said eccentric to a pivot L on thearm B, the connection being made adjustable by a right and left handscrew J; a counterbalance for the arm B; a brake mechanism connected tobe applied automatically when the arm is swung upwardly to slacken thedriving-belt; hoods M with adjustable flaps 12 and 18, embracing thesaid grinding-wheels E, provided with trunks N connecting the same tothe said hollow base, all coacting substantially as described and forthe purpose specified.

5. In a machine of the class described, the combination of a hollow baseA; an arm B pivoted to the said base; boxings B carried by said arm; ashaft D with a driving-pulley D in said boxings; grinding-wheels E onsaid shaft; a shaft H supported in suitable bearings O on the base; ahand-wheel I for operating the said shaft; an adjustable connection fromsaid eccentric to a pivot L on the arm B, the connection being madeadjustable by a right and-left hand screw J; a counterbalance for thearm B, consisting of a socket K on said base, a plunger 6 in saidsocket, a spring 7 for throwing said plunger up against the under sideof the arm B; a brake mechanism consisting of a band B secured to thebase A and embracing a brake-wheel R at the end of the pulley D, theupper end of said brake being secured to a lugVon the arm B whereby thebrake will be applied automatically when the arm is swung upwardly toslacken the driving-belt; and hoods M embracing the said grinding-wheelsE, all coacting substantially as described and for the purposespecified.

6. In a machine of the class described, the combination of a hollow baseA; an arm B pivoted to the said base; boxings B carried by said arm; ashaft D with a driving-pulley D in said boxings; grinding-wheels Eonsaid shaft; a shaft H supported in suitable bear ings O on the base; ahand-wheel I for operating the said shaft; an eccentric on the saidshaft; an adjustable connection from said eccentric to a pivot L on thearm B, the connection being made adjustable by a right and left handscrew J; a counterbalance for the arm B; a brake mechanism consisting ofa band R secured to the base A and embracing a brakewheel R at the endof the pulley D, the upper end of said brake being secured to a lug V onthe arm B whereby the brake will be applied automatically when the armis swung upwardly to slacken the driving belt; and hoods M embracing thesaid grinding-wheels E, all coacting substantially as described and forthe purpose specified.

7. In a machine of the class described, the combination of a hollow baseA; an arm B pivoted to the said base; boXings B carried by said arm; ashaft D with a driving-pulley D in said boxings; grinding-wheels E onsaid shaft; a shaft H supported in suitable bearings O onthe base; ahand-wheel I for operating the said shaft; an eccentric G on the saidshaft; an adjustable connection from said eccentric to a pivot L on thearm B, the con- 8. In a machine of the class described, the

combination of a hollow base A; an arm B pivoted to the said base;boxings B carried by said arm; a shaft D with a driving-pulley D in saidboxings; grinding wheels E on said shaft; a shaft H supported insuitable bearings O on the base; a hand-wheel I for operating the saidshaft; an eccentric G on the said shaft; an adjustable connection fromsaid eccentric to a pivot Lon the arm B, the connection being madeadjustable by a right and left hand screw J; a counterbalance for thearm B; a brake mechanism connected to be applied automatically when thearm -is swung upwardly to slacken the driving-belt; and hoods M withadjustable flaps 12 and 13, all coacting substantially as described andfor the purpose specified.

9. In a machine of the class described, the combination of a hollow baseA; an arm B pivoted to said base; a shaft with driving-pulley andgrinding-wheel thereon carried in suitable bearings by said arm; aneccentric on a suitable shaft with means for actuating the same andconnections from the said eccentric to the arm B for adjusting the same;a counterbalance for the arm; a brake connected to be applied when thearm is moved to slacken the driving-belt; and a hood embracing thegrinding-wheel, connected to the hollow base, co

acting for the purpose specified.

10. In a machine of the class described, the

movedto slacken the driving-belt, coacting for the purpose specified.

11. In a machine of the class described, the combination of a hollowbase A; an arm B pivoted to the said base; a shaft with driving-pulleyand grinding-wheel thereon, carhood embracing the grinding-wheel,connected to the hollow base, coacting for the purpose specified.

12. In a machine of the class described, the combination of a base A; anarm B pivoted to the said base; a shaft with driving-pulley andgrinding-wheel thereon, carried in suitable bearings by said arm; aneccentric on a suitable shaft, with means for actuating the same andconnections from the said eccentric to the arm B for adjusting the same,coacting for the purpose specified.

13. In a machine of the class described, the combination of a hollowbase; a shaft with driving-pulley and grinding-wheel thereon, carried insuitable adjustable bearings supported by said base; means for adjustingthe bearings up and down for the purpose of putting tension on thedriving-belt; a brakebelt connected to be applied when the belt isslackened; a counterbalance for the parts; and a suitable hood embracingthe grindingwheel connected to the hollow base for car- Iyiing away thedust, for the purpose speci- 14. In a machine of the class described,the combination of a base; a shaft with drivingpulley and grinding-wheelthereon, carried in suitable adjustable bearings, supported by saidbase; means for adjusting the bearings up and down for the purpose ofputting tension on the driving-belt; a brake-belt connected to beapplied when the belt is slackened; and a counterbalance for the parts,for the purpose specified.

15. In a machine of the class described, the combination of a hollowbase; a shaft with driving-pulley and grinding-wheel thereon, carried insuitable adjustable bearings supported by said base; means for adjustingthe bearings up and down for the purpose of putting tension on thedriving-belt; and a suitable hood embracing the grinding-wheel connectedto the hollow base for carrying away the dust, for the purposespecified.

16. In a machine of the class described, the combination of a base; ashaft with drivingpulley and grinding-Wheel thereon, carried in suitableadjustable bearings, on an arm pivotally supported by said base; andmeans for adjusting the bearings up and down for the purpose of puttingtension on the drivingbelt, for the purpose specified.

In Witness whereof I have hereunto set my hand and seal in the presenceof two witnesses.

WVILLIAM R. FOX. [L. s]

Witnesses:

GEO. K. MoMULLEN, KATHARINE KUNZI.

